Reaction of N-fluoropyridinium fluoride with isonitriles and TMSN3: a convenient one-pot synthesis of tetrazol-5-yl pyridines
作者:Alexander S. Kiselyov
DOI:10.1016/j.tetlet.2005.05.066
日期:2005.7
Reaction of N-fluoropyridiniumfluoride generated in situ with a series of isonitriles and TMSN3 led to the formation of the corresponding tetrazol-5-yl pyridines in good yields (37–84%). A similar reaction sequence for quinoline yielded the respective derivatives of 2-quinoline. The proposed reaction mechanism involves the intermediate formation of a highly reactive carbene species.
A novel method for the regioselective C2-chlorination of heterocyclic N-oxides has been developed. PPh3/Cl3CCN were used as chlorinating reagents and the desired N-heterocyclic chlorides were obtained smoothly in satisfactory yields. The reactions proceeded in a highly efficient and selective manner across a broad range of substrates demonstrating excellent functional group tolerance. In addition,
Described herein are compounds and pharmaceutical compositions containing such compounds, which inhibit the activity of 5-lipoxygenase (5-LO). Also described herein are methods of using such 5-LO inhibitors, alone and in combination with other compounds, for treating respiratory, cardiovascular, and other leukotriene-dependent or leukotriene mediated conditions, diseases, or disorders.
Fused Tetrazoles as Azide Surrogates in Click Reaction: Efficient Synthesis of N-Heterocycle-Substituted 1,2,3-Triazoles
作者:Buddhadeb Chattopadhyay、Claudia I. Rivera Vera、Stepan Chuprakov、Vladimir Gevorgyan
DOI:10.1021/ol100745d
日期:2010.5.7
It has been shown that various pyrido-, quinolino-, pyrazino-, and quinoxalinotetrazoles can be used efficiently as azide components in Cu-catalyzed clickreaction with alkynes. This method allows for efficient synthesis of a wide variety of N-heterocyclic derivatives of 1,2,3-triazoles.
Luminescence Modulations of Rhenium Tricarbonyl Complexes Induced by Structural Variations
作者:Hélène C. Bertrand、Sylvain Clède、Régis Guillot、François Lambert、Clotilde Policar
DOI:10.1021/ic5007007
日期:2014.6.16
metal–carbonyl complexes SCoMPIs for single-core multimodal probes for imaging. Re(I) tricarbonylcomplexes have unique photophysical properties allowing for their unequivocal detection in cells but also present some weaknesses such as a very low luminescence quantum yield in aqueous medium. Further optimizations would thus be desirable. We therefore developed new Re(I) tricarbonylcomplexes prepared from